<!DOCTYPE html>
<html>
    <head>
        <meta charset='utf-8' />
        <title>第二天课程</title>
        <meta name='keywords' content='' />
        <meta name='description' content='' />
    </head>
    <body>
        <bdo dir='rtl'>说好不回头</bdo> <br /> <!--  文字方向  -->
        <bdo dir='ltr'>你的圆珠笔</bdo>  <!--  文字方向  -->
        <br />
        <details>
            <summary>四大名著</summary>
            <p>石头记</p>
            <p>水浒传</p>
            <p>三国演义</p>
            <p>西游记</p>
        </details>
    </body>
</html>